| 413 |
ira |
1 |
/*******************************************************************************
|
|
|
2 |
* LogEntry.java
|
|
|
3 |
*
|
|
|
4 |
* Holds the LogEntry class, which is a representation of what happened every
|
| 415 |
ira |
5 |
* during the critical parts of step() in Scheduler-derived classes.
|
| 413 |
ira |
6 |
*
|
|
|
7 |
* Copyright (c) 2006, Ira W. Snyder (devel@irasnyder.com)
|
|
|
8 |
*
|
|
|
9 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
10 |
* of this software and associated documentation files (the "Software"), to deal
|
|
|
11 |
* in the Software without restriction, including without limitation the rights
|
|
|
12 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
13 |
* copies of the Software, and to permit persons to whom the Software is
|
|
|
14 |
* furnished to do so, subject to the following conditions:
|
|
|
15 |
*
|
|
|
16 |
* The above copyright notice and this permission notice shall be included in
|
|
|
17 |
* all copies or substantial portions of the Software.
|
|
|
18 |
*
|
|
|
19 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
20 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
21 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
|
22 |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
23 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
|
24 |
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
|
25 |
* IN THE SOFTWARE.
|
|
|
26 |
******************************************************************************/
|
|
|
27 |
|
| 415 |
ira |
28 |
/**
|
|
|
29 |
* A representation of critical events that happen in Scheduler-derived classes.
|
|
|
30 |
*
|
|
|
31 |
* @class CS431 Fall 2006
|
|
|
32 |
* @author Ira W. Snyder (devel@irasnyder.com)
|
|
|
33 |
*/
|
|
|
34 |
public class LogEntry
|
| 413 |
ira |
35 |
{
|
| 415 |
ira |
36 |
/** Message types that are possible */
|
|
|
37 |
public static enum MsgType
|
|
|
38 |
{
|
|
|
39 |
/** Represents a Process starting on the CPU */
|
|
|
40 |
START,
|
| 413 |
ira |
41 |
|
| 415 |
ira |
42 |
/** Represents a Process completing this timeslice on the CPU,
|
|
|
43 |
* but not being completely finished yet.
|
|
|
44 |
*/
|
|
|
45 |
EXPIRE,
|
|
|
46 |
|
|
|
47 |
/** Represents a Process completing its execution completely. */
|
|
|
48 |
COMPLETE
|
|
|
49 |
};
|
|
|
50 |
|
|
|
51 |
/** The time at which this event happened */
|
| 413 |
ira |
52 |
public final int time;
|
| 415 |
ira |
53 |
|
|
|
54 |
/** The process that caused this event */
|
| 413 |
ira |
55 |
public final Process proc;
|
| 415 |
ira |
56 |
|
|
|
57 |
/** The type of message that this event represents */
|
| 413 |
ira |
58 |
public final MsgType msg;
|
|
|
59 |
|
| 415 |
ira |
60 |
/**
|
|
|
61 |
* Constructor for the LogEntry class.
|
|
|
62 |
*
|
|
|
63 |
* @param proc the Process that caused this event
|
|
|
64 |
* @param time the time when this event happened
|
|
|
65 |
* @param msg the type of message that this represents
|
|
|
66 |
*/
|
| 413 |
ira |
67 |
public LogEntry (Process proc, int time, MsgType msg)
|
|
|
68 |
{
|
|
|
69 |
this.time = time;
|
|
|
70 |
this.proc = proc;
|
|
|
71 |
this.msg = msg;
|
|
|
72 |
}
|
|
|
73 |
|
| 415 |
ira |
74 |
/**
|
|
|
75 |
* Convert this LogEntry to a String for printing.
|
|
|
76 |
*
|
|
|
77 |
* @return the String representation of this LogEntry
|
|
|
78 |
*/
|
| 413 |
ira |
79 |
public String toString ()
|
|
|
80 |
{
|
|
|
81 |
String action = new String ("invalid");
|
|
|
82 |
|
|
|
83 |
switch (msg)
|
|
|
84 |
{
|
|
|
85 |
case START:
|
|
|
86 |
action = "started";
|
|
|
87 |
break;
|
|
|
88 |
case EXPIRE:
|
|
|
89 |
action = "expired";
|
|
|
90 |
break;
|
|
|
91 |
case COMPLETE:
|
|
|
92 |
action = "finished";
|
|
|
93 |
break;
|
|
|
94 |
}
|
|
|
95 |
|
|
|
96 |
return "@" + time + " " + proc.name + " " + action;
|
|
|
97 |
}
|
|
|
98 |
}
|
|
|
99 |
|
|
|
100 |
/* vim: set ts=4 sts=4 sw=4 expandtab: */
|
|
|
101 |
|